261630662 has 16 divisors (see below), whose sum is σ = 408386880. Its totient is φ = 125605032.

The previous prime is 261630661. The next prime is 261630667. The reversal of 261630662 is 266036162.

261630662 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261630661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20708 + ... + 30855.

It is an arithmetic number, because the mean of its divisors is an integer number (25524180).

Almost surely, 2^261630662 is an apocalyptic number.

261630662 is a deficient number, since it is larger than the sum of its proper divisors (146756218).

261630662 is a wasteful number, since it uses less digits than its factorization.

261630662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51667.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 261630662 is about 16175.0011437403. The cubic root of 261630662 is about 639.5819714821.

The spelling of 261630662 in words is "two hundred sixty-one million, six hundred thirty thousand, six hundred sixty-two".